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DESCRIPTION OF PLATES. 
Plate XIII (after Von Tavel.) 
Fig. 13. Cucurbitaria platani , Yon Tav.; ascospores X 380. 
14. Formation of sporopycnidium ; the spore three days after sowing. X 380. 
15. The same spore five hours later X 380. 
16. The same spore twenty hours later X 380. 
17. Beginnings of pycnidia X 600. 
18. A later stage of the same X 600. 
19. Section through a young pycnidium, the cavity not yet formed X 700. 
20. Section through an older pycnidium X 700. 
21. Section through a fully-formed pycnidium X 700. 
Plate XI Y (G. Massee, del.) 
Fig. 1. Tremella tremelloides, (Berk.) Mass., portion of a plant, natural size. 
1 a. Basidia and spores of same X 400. 
2. Stella Americana, Mass. ; specimen natural size. 
2a. Yertical section of same, natural size; (a) outer wall of peridium; (6)inner 
layer. 
2 6. Spores of same X 350. ' 
2c. Spore of same, showing epispore, as seen when X 1,200. 
3. Trichosporium Curtisii, Mass. ; portion of a specimen natural size. 
4. Trichosporium phyrrhosporium, (Berk.) Mass.; (<i) conidia; ( b ) a condio- 
phore detached from its hypha, all X 350. 
5. Trichosporium apiosporium, (B. & Br.) Mass.; couidia X 350. 
6. Badhamia nodulosa, (Cke. & Balf.) Mass.; entire specimens X 40. 
6 a. Portion of capillitium and spores of same X 350. 
6b. Spore of same X 1200. 
7. Physarum scyphoides, Cooke and Balf.; specimens X 40. 
7 a. Portion of capillitium and spores of same X 350. 
7 b. Spore of same X 1200. 
8. Tilmadoche gyrocephala, Rost.; specimen X 40. 
8 a. Portion of capillitium and spores of same X 350. 
8 6. Spore of same X 1200. 
